/Engine/Source/Runtime/Engine/Classes/Animation/AnimData/IAnimationDataController.h
Remove a single key from the attribute with provided identifier. Broadcasts a EAnimDataModelNotifyType::AttributeChanged notify if successful.
Whether or not the attribute key was successfully removed
bool RemoveAttributeKey ( const [FAnimationAttributeIdentifier](API\Runtime\Engine\Animation\AnimData\FAnimationAttributeIdentifier) & AttributeIdentifier, float Time, bool bShouldTransact )